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 <title>Documentation for method: 
PHPCrawler::setUrlCacheType()</title>
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<h1 id="head">
  <span>Method: 
PHPCrawler::setUrlCacheType()</span>
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 <span><a href="overview.html"><< Back to class-overview</a></span>
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<!--<?php include("google_code.php"); ?> -->

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Defines what type of cache will be internally used for caching URLs.
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<b>Signature:</b>
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public setUrlCacheType($url_cache_type)
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<b>Parameters:</b>
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<tr><td id="paramname" width="1%"><b>$url_cache_type</b>&nbsp;</td><td width="1%"><i><i>int</i></i>&nbsp;</td><td width="*">1 -&gt; in-memory-cache (default setting)<br>                           2 -&gt; SQlite-database-cache<br><br>                           Or one of the <a href="../PHPCrawlerUrlCacheTypes/overview.html" class="inline">PHPCrawlerUrlCacheTypes</a>::URLCACHE..-constants.</td></tr>
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<b>Returns:</b>
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<tr> <td width="1%"><i><i>bool</i></i>&nbsp;</td> <td width="*"></td></tr>
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<b>Description:</b>
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Currently phpcrawl is able to use a in-memory-cache or a SQlite-database-cache for<br>caching/storing found URLs internally.<br><br>The memory-cache (<a href="../PHPCrawlerUrlCacheTypes/overview.html" class="inline">PHPCrawlerUrlCacheTypes</a>::URLCACHE_MEMORY) is recommended for spidering small to medium websites.<br>It provides better performance, but the php-memory-limit may be hit when too many URLs get added to the cache.<br>This is the default-setting.<br><br>The SQlite-cache (<a href="../PHPCrawlerUrlCacheTypes/overview.html" class="inline">PHPCrawlerUrlCacheTypes</a>::URLCACHE_SQLite) is recommended for spidering huge websites.<br>URLs get cached in a SQLite-database-file, so the cache only is limited by available harddisk-space.<br>To increase performance of the SQLite-cache you may set it's location to a shared-memory device like "/dev/shm/"<br>by using the <a href="method_detail_tpl_method_setWorkingDirectory.htm" class="inline">setWorkingDirectory()</a>-method.<br><br>Example:<code>$crawler-&gt;setUrlCacheType(PHPCrawlerUrlCacheTypes::URLCACHE_SQLITE);<br>$crawler-&gt;setWorkingDirectory("/dev/shm/");</code><br><br><b>NOTE:</b> When using phpcrawl in multi-process-mode (<a href="method_detail_tpl_method_goMultiProcessed.htm" class="inline">goMultiProcessed()</a>), the cache-type is automatically set<br>to PHPCrawlerUrlCacheTypes::URLCACHE_SQLITE.
  
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